Forum Discussion

Rajasekhar_M's avatar
Rajasekhar_M
Icon for Nimbostratus rankNimbostratus
Jul 06, 2025
Solved

iRules

Can we use iRules for Performance L4 Virtual server?
irule
  • VGF5's avatar
    VGF5
    Jul 07, 2025

    Performance (Layer 4) virtual servers operate at the transport layer and are designed for high throughput and low latency. They do not support iRules, which require the system to process traffic at a higher layer (typically Layer 7 with Standard or Performance (HTTP) virtual servers) where the full TCP/UDP payload is available for inspection and manipulation.

    Please refer # K8082: Overview of virtual server types (https://support.f5.com/csp/article/K8082

VGF5's avatar
VGF5
Icon for Cumulonimbus rankCumulonimbus
Jul 07, 2025

Performance (Layer 4) virtual servers operate at the transport layer and are designed for high throughput and low latency. They do not support iRules, which require the system to process traffic at a higher layer (typically Layer 7 with Standard or Performance (HTTP) virtual servers) where the full TCP/UDP payload is available for inspection and manipulation.

Please refer # K8082: Overview of virtual server types (https://support.f5.com/csp/article/K8082

  • Injeyan_Kostas's avatar
    Injeyan_Kostas
    Icon for Nacreous rankNacreous
    Jul 08, 2025

    That's not accurate.

    There are irule events that can be still triggered even in a performance l4 virtual server like client_accepted or lb_selected etc

    So, yes irule can still be used but with limited events